Bomb Alert

Teach-ins on nuclear arms

What a waste it would be after 4 billion tortuous years of evolution if the dominant organism contrived its own self-destruction," Carl Sagan, popular guardian of the cosmos and professor of astronomy at Cornell, told a crowd of 2,000 in Ithaca, N.Y. "We are the first species to have devised the means." George Kistiakowsky, an adviser to President Dwight Eisenhower who had worked on the Manhattan Project, told a Harvard audience: "If I knew then what I know now, I never would have helped to develop the bomb." At U.C.L.A.,...

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